By using multiple crystals of periodically poled lithium niobate arranged in a fan-fold configuration with mirrors between the crystals to periodically refocus the light and retroreflect it after the final crystal, one can achieve very long interaction lengths and efficient frequency conversion at low input power. We present the theory and numerical simulations of devices using this concept, including devices for singly resonant optical parametric oscillation and second-harmonic generation. We find quantitative agreement between plane-wave analysis of these devices and numerical simulations in three spatial dimensions.
© 1999 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
Gerald T. Moore and Karl Koch, "Efficient frequency conversion at low power with periodic refocusing," J. Opt. Soc. Am. B 16, 781-791 (1999)